package com.itheima.canal.listener;

import com.alibaba.otter.canal.protocol.CanalEntry;
import com.itheima.config.RabbitMQConfig;
import com.xpand.starter.canal.annotation.CanalEventListener;
import com.xpand.starter.canal.annotation.ListenPoint;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;

@CanalEventListener   //声明当前的类是canal的监听类
public class BusinessListener {

    @Autowired
    private RabbitTemplate rabbitTemplate;


    @ListenPoint(schema = "changgou_business",table = "tb_ad")
    public void adUpdate(CanalEntry.EventType eventType,CanalEntry.RowData rowData){
        System.out.println("广告表数据发生改变");

//        rowData.getBeforeColumnsList().forEach((c)-> System.out.println("改变前的数据:"+c.getName()+"::"+c.getValue()));
//
//        rowData.getAfterColumnsList().forEach((c)-> System.out.println("改变之后的数据:"+c.getName()+"::"+c.getValue()));
//
        for (CanalEntry.Column column : rowData.getAfterColumnsList()){
            if ("position".equals(column.getName())){
                System.out.println("发送最新的数据到MQ:"+column.getValue());

                //发送消息
                rabbitTemplate.convertAndSend("", RabbitMQConfig.AD_UPDATE_QUEUE,column.getValue());

            }

        }
    }

}
